dns_mx(3) Library Functions Manual dns_mx(3) NAME dns_mx - look up Mail eXchanger SYNTAX #include <libowfat/dns.h> int dns_mx(stralloc* out,stralloc* fqdn); DESCRIPTION dns_mx looks up MX records for the fully-qualified domain name in fqdn. It puts the MX records into out and returns 0. Each MX record is a two-byte MX distance (big endian) followed by a \0-terminated dot-encoded domain name. If the domain does not exist in DNS, or has no MX records, out will be empty. If dns_mx has trouble with the DNS lookup or runs out of memory, it returns -1, setting errno appropriately. It may or may not change out. SEE ALSO dns_mx_packet(3), dns_ip4(3), dns_ip6(3) dns_mx(3)
NAME | SYNTAX | DESCRIPTION | SEE ALSO
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